SegFault after compiling

[amir-hoseyn77]

Hello, After compiling the SCIP, runnung the ./bin/scip produce the error Segmentation fault (core dumped). I run the gdb for scip and trace the stack:

(gdb) run
Starting program: /home/arabi_a/solvers/scip/scipoptsuite-8.1.0/build/bin/scip
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff69d17bc in daxpby_k_HASWELL () from /usr/lib/x86_64-linux-gnu/libopenblas.so.0
(gdb) bt
#0  0x00007ffff69d17bc in daxpby_k_HASWELL () from /usr/lib/x86_64-linux-gnu/libopenblas.so.0
#1  0x00007ffff0f14059 in gotoblas_dynamic_init () from /usr/lib/x86_64-linux-gnu/libblas.so.3
#2  0x00007ffff0d1a053 in gotoblas_init () from /usr/lib/x86_64-linux-gnu/libblas.so.3
#3  0x00007ffff7fe0b8a in call_init (l=<optimized out>, argc=argc@entry=1, argv=argv@entry=0x7fffffffe358, env=env@entry=0x7fffffffe368) at dl-init.c:72
#4  0x00007ffff7fe0c91 in call_init (env=0x7fffffffe368, argv=0x7fffffffe358, argc=1, l=<optimized out>) at dl-init.c:30
#5  _dl_init (main_map=0x7ffff7ffe190, argc=1, argv=0x7fffffffe358, env=0x7fffffffe368) at dl-init.c:119
#6  0x00007ffff7fd013a in _dl_start_user () from /lib64/ld-linux-x86-64.so.2
#7  0x0000000000000001 in ?? ()
#8  0x00007fffffffe5e0 in ?? ()
#9  0x0000000000000000 in ?? ()

My Ipopt compiled with only MUMPS. I run these command to compile the SCIP:

cmake .. -DLPS=cpx -DCPLEX_DIR=/usr/local/ibm/ILOG/CPLEX_Studio128/cplex/ -DTPI=tny
make -j2

What should I do?

[matbesancon]

hi, thanks for reporting, I'm assigning @svigerske since this seems like an ipopt issue. Did you try running something else than SCIP with your ipopt installation?

[svigerske]

It looks like OpenBlas is loaded dynamically and then the library initialization fails. I cannot say why that happens, though. I agree that it would be good to first try whether Ipopt alone works with this blas library (make test in the Ipopt build).

You could also do a debug-build of Ipopt and SCIP, so the ?? may be replaced by something informative. And/or do a run under valgrind.

[amir-hoseyn77]

My ubuntu is 18.04 and this oldness causes some out-of-date packages. I added focal(20.04) repos to my Linux and reinstalled libopenblas-dev, libopenblas-base, libopenblas-serial-dev(serial||openmp||pthread) and liblapack via apt manager. After that the MUMPS was recompiled and then IPOPT recompiled with debug mode, and finally SCIP in debug mode.

At this stage SCIP is working in debug mode. I will check in release mode + concurrent mode.

[amir-hoseyn77]

Is UG alive for concurrency? What is the manual for using UG

[svigerske]

Closing as this doesn't seem to be an issue with SCIP.

UG docu is at https://ug.zib.de/. To make it do concurrent runs, look at the options for racing mode. There is also a concurrent solve included in SCIP.